Gun perforator



G. TURECHEK GUN PERFORATOR Filed Nov. 24, 1943 INV 0R /./3 G50/fai @ffy/7V BY r , ATTORNEY Patented July l0, 1945 George F. 'Tureohek t La ` My invention relates to gun perforators, that is.` to devices adapted to be lowered Among the objects of my invention are: First,V to -provide a gun Yperiorator wherein sevhigh velocity through the connecting passages between the gun units' Second, to provide a particularly simple, yet

gun perforator which is rugged, in construction .and which comprises a minimum number of parts;

` Third, to provide a gun to load and service; and

Fourth, to provide a gun perforator wherein the perforator which is easy gun bores have maximum length -in proportion to the gun body diameter and which is inherently capable oi' permitting close spacing of the gun units so that a large number of lgun units may be incorporated in a gun'body of/given ylength an'd weight.

With the above and other objects in view, as may appear hereinafter, referenceis directed to the accompanying drawing, in which:

Figure 1 is a fragmentary longitudinal sectional( view of a gun perforator incorporating my invention;

Figure 2 is a transverse sectional through 2 2 of Figure l;

Figure 3 isV an enlargedl side view of a bullet adapted to lit my gun perforator; and

Figuref'i is a base end view of the bullet.

The gun perforator includes a gun body I in the form of a. cylindrical bar of metal having internally threaded sockets at each end` The sockets are connected by one or more' longitudinal bores 2. Three such bores are shownV in the drawing. Each oi the longitudinal bo-res 2 are view thereof intersected at equally spaced intervals by laterally directed gun bores 3. The longitudinal bores are closed at their ends by upper end plugs 5 and' lower end lplugs 4 which are screw-threaded therein. Each longitudinal bore 2 receives a plurality of explosive cartridges l6 .which are tubular in form and adapted to be positioned opposite the gun bores 3. Filler plugs yI are interposed between the cartridges 6. The liller plugs likewise aretubular in form. The bores through the car: tridges 6 and filler plugs l. are of such size as are \ OFFICE to accommodate without excess space a fuse cord 8. i

It is essential for proper operation of my gun perforatorl that be used,

Prirnacordjf having an explosive core of pentaerythritetetranitrate (PETN), is satisfactory for this purpose. The ignition progresses in Primacord at. the rate of about 20,350 feet per second. This is important for by such cartridges are caused to ignite virtually simultaneously, the Illlers act, in so far asknown, as if no pressure diierntial exists. There may be in fact, virtually no pressure differential, or, 'it may be that the duration of anyl pressure dif- -ferentia1 is so short that the inertia of the filler may be made is not overcome and hence does not move appreciably. In any event, the several explosive cartridges each re as if the filler plugs therebetween were rigid or a part of the gun body itself. 'The iiller plugs maybe made of steel or, ifdesired,

of plastic or other substantially noncompressible material which` disintegrates or fractures when subjected to the enormous compression pressures created by the ignition of the cartridges, so that they may be readily removed for reloading' the gun perforator. o

Each o1' the 'gun bores 3 receives a bullet 9. The bullets have preferably an ogive forward end and a frusta-conical rear or base end. To the base end is spotwelded a retaining spider I0 in the form of a disk having radiating arms I I which, when the disk is ilat, as shown by-solid lines in Figures 3 and 4, define a circle slightly larger than the bullet; By reason of the clearance formed by the frusto-conical end of the bullet the arms II of Vthe spider yield so that the bullet may be 1 forced into the gun bore, but cannot be manually withdrawn. The extremities of the gun b/ores are closed byseal disks/ I2. y

' The' lower end of the gun body isprovided with a base,I plug-lf I 3 and the upper end is provided with a head member I4. A cavity is provided between the headfmemberand the gun body, which cavity receives a fuse block I5A adapted toreceive the fuse cords 8, and provided mth a central bore'in which is positioned an igniter I6. The igniter I'6 is adapted to be set ofi by current supplied through an electrical cord I'I which extends through the g head member I4 and communicates with the conductor. core of a not shown.

In the structure shown one igniter is provided for all three fuse cords, so that all the bullets suitable suspension cable fast ignition the.

are ilred very nearly simultaneously. However, each of the fuse cords may be individually ignited so that the different groups of gun units may be iired separately.

Various changes and alternate arrangements may be made within the scope oi the appended claims, in which it is my intention to claim all novelty inherent in the invention.

I claim:

1. A gun perforator comprising: a gun body detining alongitudinal bore and several 1aterally directed gun bores communicating with said longitudinal bore; explosive cartridge units and nonexplosive iiller units slidably contained and positioned in alternate succession end to end in said longitudinal bore, said cartridge units being located in said longitudinal bore opposite the points of communication with said gun bores and said filler umts being located in said longitudinal bore intermediate said cartridge units; and an ignition fuse interconnecting said cartridge units.

2. A gun body comprising: a gun body deiining a longitudinal bore of uniform diameter and a plurality of gun bores communicating therewith; a plurality of tubular shaped explosive cartridge units and a pluralityv of non-explosive tubular shaped nllcr units slidably contained and positioned in alternate succession end to end in said longitudinal bore, said cartridge units being located in said longitudinal bore oppite the point of communication with said gun bores and said iiller units being located in said longitudinal bore intermediate said cartridge units and substantially filling the space therebetween; and a fast burning ignition cord threaded through said spacer units and cartridge units; and means for igniting said ignition cord to effect virtual simultaneous ignition of said cartridge units.

3. A single piece gun perforator comprising: a gun body defining a plurality of laterally directed gun bores; a continuous longitudinal cartridge chamber common to said gun bores; explosive cartridges for said cartridge bore adapted to be positioned opposite each of said gun bores; separate inert filler members in said cartridge bore between said cartridges; said cartridges and filler members dening a passageway extending the length of said cartridge bores; and a fuse extending continuously throughout said passageway defined by said cartridges and iiller members.

4. A gun perforator comprising: a gun body..

defining a longitudinal bore extending end to end and a plurality of laterally directed guny bores intersecting said longitudinal bore; removable plugs closing the ends of said longitudinal bore; a plurality of explosive cartridge units and nonexplosive spacer units adapted to be inserted into said longitudinal bore through its ends and ar' ranged in alternate succession therein between said plugs, said cartridge units being positioned opposite said gun bores and said spacer units substantially iilling the spaces between said cartridge units; said cartridge units and spacer units denning a continuous longitudinal passageway between said removable plugs; and means fitting said passageway for eecting initially simultaneous ignition of said cartridge units.

5. A gun perforator comprising: a gun body denning a longitudinal bore and several laterally directed gun bores communicating with said longitudinal bore; explosive cartridge units and non-explosive nller units adaptedto be slipped in alternate succession into said longitudinal bore, the nller umts being proportioned to nll the spaces between said cartridge units when said cartridge units are disposed opposite said gun bores; and means extending continuously through said car-v tridges and spacer units for eiiecting virtually simultaneous ignition of said cartridge units.

6. A gun perforator comprising: a gun body denni a plurality of laterally directed gun bores; a longitudinal cartridge bore common to said gun bores; explosive cartridges for said cartridge bore adapted to be positioned opposite each of said gun bores; separate inert filler members in said cartridge bore between said cartridges; said cartridges and nller members deiining a passageway extending the length of said cartridge bore; and means extending continuously through said passageway for electing virtual simulta-l neous ignition of said cartridges.

'1. A gun .perforator comprising: A a gun body defining a longitudinal cartridge chamber and a plurality of laterally directed gun bores communicating therewith; successively disposed longitudinally slidable explosive cartridge units and nonexplosive spacer units in said cartridge chamber; and means common -to said cartridges for ei'l'ecting virtually simultaneous ignition thereof, whereby. the eil'ective pressures at the extremities of each spacer un'it remain substantially equal and hold said spacer units against displacement in said longitudinal cartridge chamber.

8. A gun perforator comprising: a gun body in the form of a single piece cylindrical block defining at least one longitudinal continuous bore of uniform diameter and longitudinally spaced 4 laterally directed gun bores intersecting said longitudinal bore; a plurality of explosive cartridges and non-explosive tiller blocks of equal diameter slidably mounted in alternate succession in said longitudinal bore, the cartridges be-. ing opposite said gun bores; and a means connecting said cartridges in series .whereby the cartridges may be ignited virtually simultaneously to maintain, in eilect, substantially equal and opposite pressures against the extremities of said filler blocks.

9. A gun perforator comprising: a gun body in the form of a single piece cylindrical block defining at least one longitudinal continuous bore of uniform diameter and longitudinally spaced laterally directed gun bores intersecting said longitudinal bore; a plurality oi tubular explolsive cartridges and tubular iiller blocks slidably fitting and completely filling said longitudinal bore, the cartridgesbeing disposedopposite said gun bores; and means threaded through the bores of said cartridges and filler blocks to connect said cartridges in series whereby the cartridges may be ignited virtually simultaneously to maintain, in eilect, substantially equal and opposite pressures against the extremities of said iiller blocks.

GEORGE F. TURECHEK. 

